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Map of the sites holding the search term ""Potamogeton friesii""

There are 23 sites that mention "Potamogeton friesii".

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…exceptionally diverse and well balanced community of pondweeds, nine species of Potamogeton having been recently recorded, including two which are nationally rare. The open water is primarily dominated by fennel pondweed Potamogeton pectinatus, small pondweed P.berchtoldii exerti…

Baston and Thurlby Fens

…palustris, greater bladderwort Utricularia vulgaris and the scarce fen pondweed Potamogeton coloratus. On osier bed is also included within the site and a rough grazing meadow dominated by a variety of rush and sedge. An exceptionally rich flora has developed within the Counter D…

Pentland Firth Islands

…hree nationally scarce species oysterplant Mertensia maritima and the pondweeds Potamogeton friesii and Potamogeton filiformis, occur.

Chasewater And The Southern Staffordshire Coalfield Heaths

…e Carex canescens. The latter site contains abundant bottle sedge, bog pondweed Potamogeton polygonifolius and Sphagnum inundatum. A swamp on No Man’s Bank is dominated by common sedge, marsh cinquefoil and common cotton grass, with bog pondweed, water horsetail and jointed rush …

Halvergate Marshes

…es along the peaty margin contain a community typified by broad leaved pondweed Potamogeton natans, water violet Hottonia palustris and the nationally scarce whorled water milfoil Myriophyllum verticillatum. Away from the margins, on the clay soils, the ditches tend to be dominat…

Lochs of Harray and Stenness

…ual mix of plant species. These include nine species of pondweed, two of which, Potamogeton filiformis, and Potamogeton friesii are nationally scarce. Other nationally scarce species present include lesser bearded stonewort Chara curta and tassel stonewort Tolypella glomerata. Bo…

Broad Fen, Dilham

…opment is limited to a few species which favour these conditions. The pondweeds Potamogeton obtusifolius and Potamogeton friesii are frequent with bladderwort Utricularia vulgaris and white water lily Nymphaea alba. Surrounding the open fen are large areas of semi mature alder ca…

Loch of Strathbeg

…arge number of regional and national rarities such as the flat-stalked pondweed Potamogeton friesii. Slender-leaved pondweed Potamogeton filiformis and creeping spearwort Ranunculus reptans have also been recorded. In addition, extensive areas of semi-fixed dunes, fixed calcareou…

Montgomery Canal

… unusually species-rich. The submerged vegetation is characterised by pondweeds Potamogeton spp., including perfoliate pondweed Potamogeton perfoliatus and lesser pondweed Potamogeton pusillus and the nationally scarce grass-wrack pondweed Potamogeton compressus. Other notable aq…

Pocklington Canal

…ly rare species soft hornwort Ceratophyllum submersum and flat stalked pondweed Potamogeton friesii, together with five additional pondweeds Potamogeton spp. The canal is fringed by swamp, fen and inundation communities including significant stands of common reed Phragmites austr…

Damgate Marshes, Acle

…es along the peaty margin contain a community typified by broad leaved pondweed Potamogeton natans, water violet Hottonia palustris and the nationally scarce whorled water milfoil Myriophyllum verticillatum. The nationally scarce fen pondweed Potamogeton coloratus and flat stalke…

River Hull Headwaters

… Elodea canadensis, spiked water milfoil Myriophyllum spicatum, fennel pondweed Potamogeton pectinatus, curled pondweed Potamogeton crispus, shining pondweed Potamogeton lucens and more rarely, flat stalked pondweed Potamogeton friesii growing in the deeper pools. The frequent as…

North Moor

… on North Moor within the Somerset Levels and Moors. The rare hairlike pondweed Potamogeton trichoides is present and the flat stalked pondweed Potamogeton friesii has also been recorded. The ditches have a rich aquatic invertebrate community which includes two nationally rare sp…

Pevensey Levels

…t, floating and submerged aquatic plants such as duckweeds Lemna sp, pond weeds Potamogeton sp or water fern Azolla sp colonize. These are followed by larger, floating or emergent plants such as frog bit Hydrocharis morsus-ranae, bur reed Sparganium erectum and arrow head Sagitta…

Cantley Marshes

…ortion of the Broadland population of the nationally rare sharp leaved pondweed Potamogeton acutifolius and three nationally scarce species; whorled water milfoil Myriophyllum verticillatum, greater water parsnip Sium latifolium and the hairlike pondweed Potamogeton trichoides. …

Trinity Broads

…y rare holly leaved naiad Najas marina, the nationally scarce hairlike pondweed Potamogeton trichoides and other notable species such as flat stalked pondweed Potamogeton friesii. The Trinity Broads are one of the few systems clean enough to sustain a charophyte flora, with Chara…

Ashby Canal

…is vulgaris, spiked water milfoil Myriophyllum spicatum and perfoliate pondweed Potamogeton perfoliatus are locally abundant. Eight other species of pondweed have been recorded including grass wrack pondweed P. compressus and flat stalked pondweed Potamogeton friesii which are na…

Hall Farm Fen, Hemsby

…ture of the site. Canadian pondweed Elodea canadensis and broad leaved pondweed Potamogeton natans form the principal aquatics, with water violet Hottonia palustris, opposite leaved pondweed Groenlandia densa, frogbit Hydrocharis morsus-ranae, flat stalked pondweed Potamogeton fr…

Upton Broad & Marshes

…oneworts Chara spp. are present with small quantities of fennel leaved pondweed Potamogeton pectinatus, white and yellow water lilies Nymphaea alba and Nuphar lutea and the nationally scarce grass wrack pondweed P. compressus. Little Broad, an arm of the main water body, supports…

Lindean Reservoir

…seven species of pondweed including the nationally scarce flat-stalked pondweed Potamogeton friesii. More than 50 species of water beetle have been recorded within the site from loch, fen, marsh and pond communities. Among the more notable beetles are three species listed in the …

Dullatur Marsh

…a including tufted loosestrife Lysimachia thyrsiflora and flat-stalked pondweed Potamogeton friesii – both of which are Nationally Scarce – along with the uncommon hybrid water-lily Nuphar x spenneriana. The fens area dominated by bottle sedge Carex rostrata, water horsetail Equi…

Quendale

…lands. The flora of the loch includes several species of rare pondweed, notably Potamogeton friesii, and the water crowfoot Ranunculus baudotii. The Loch of Hillwell is a locally important site for wintering and breeding waterfowl.

Derwent Ings

…scarce species, greater water parsnip Sium latifolium and flat stalked pondweed Potamogeton friesii together with locally rare species such as water violet Hottonia palustris and round fruited rush Juncus compressus. The site has an outstanding assemblage of invertebrates with s…

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